Um..., swaps?!?

This would immediately tell me that I need to get more RAM.

For those wondering, I run the following comfortably in 16GB of RAM with SSD:

Postgres 9.x Ruby 2.x Rails 4.x Python 2.7 / Flask XCode 6.1.1 Chrome Safari Whatever else apps...

I don't think I would trust this in 8GB and feel like I'm productive. Remember, RAM is 10kX-100kX faster than hd, so you can never have enough.